66155351 has 4 divisors (see below), whose sum is σ = 68436600. Its totient is φ = 63874104.

The previous prime is 66155281. The next prime is 66155387. The reversal of 66155351 is 15355166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66155351 - 2²² = 61961047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66155051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1140581 + ... + 1140638.

It is an arithmetic number, because the mean of its divisors is an integer number (17109150).

Almost surely, 2^66155351 is an apocalyptic number.

66155351 is a deficient number, since it is larger than the sum of its proper divisors (2281249).

66155351 is a wasteful number, since it uses less digits than its factorization.

66155351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281248.

The product of its digits is 13500, while the sum is 32.

The square root of 66155351 is about 8133.5939780641. The cubic root of 66155351 is about 404.4408297090.

The spelling of 66155351 in words is "sixty-six million, one hundred fifty-five thousand, three hundred fifty-one".